One-dimensional theory of cracked Bernoulli-Euler beams

Adams, 1978, A vibration technique for non-destructively assessing the integrity of structures, J. Mech. Engng Sci., 20, 93, 10.1243/JMES_JOUR_1978_020_016_02

Pye, 1982, A vibration method for the determination of stress intensity factors, Engng Fract. Mechs., 16, 433, 10.1016/0013-7944(82)90121-7

Chondros, 1980, Identification of cracks in welded joints of complex structures, J. Sound Vib., 69, 531, 10.1016/0022-460X(80)90623-9

Gudmundson, 1982, Eigenfrequency changes of structures due to cracks, notches or other geometrical changes, J. Mech. Phys. Solids, 30, 339, 10.1016/0022-5096(82)90004-7

Hu, 1955, On some variational principles in the theory of elasticity and plasticity, Scientia Sinica, 4, 33

Washizu, 1982

Barr, 1966, An extension of the Hu-Washizu variational principle in linear elasticity for dynamic problems, Trans. ASME. J. Appl. Mechs., 33, 465, 10.1115/1.3625076